Balder fixed oscillating monitor


Balder is a 2½” monitor for fixed installations. It is selfoscillating and powered by water flowing through a special oscillating mechanism. Balder automatically sweeps from side to side. The speed of the sweeps and the elevation could be manually set and also be varied during operation. Balder has a water inlet with a 2½” flange (DN 65). The pipes are casted in two different materials: anodized aluminium or bronze. Parts which are vital for the correct functions, such as swivels are in stainless steel. Innovative piping technology minimizes turbulence and frictional pressure losses. There is a self-cleaning filter at the inlet to the oscillating valve that assures operation even with water containing particles, e.g. rust from the piping. Balder is very compact and weighs only 11.6 kg.


  • Compact
  • Low weight
  • Usable with river and sea water
  • Self-cleaning filter protects oscillating valve
  • Adjustable oscillating speed and elevation
  • Automatic oscillation
  • Self-drainage valve
  • Works at low temperatures
  • Runs with water or foam
  • High flows
  • Low pressure drop
Balder fixed oscillating monitor


Elevation, sweep and speed of oscillation could be preadjusted for automatic operation. When the water flows to the monitor it automatically starts to sweep and operate. During operation the settings can be manually adjusted. It is also possible to release the oscillating function during operation and manually direct the stream within 180° angle.


Balder should be used where among all features the
extremely compact design is beneficial:

  • Petrochemical plants
  • Aircraft hangars
  • Helidecks
  • Tank farms
  • Loading areas
  • Chemical plants
  • Offshore platforms

Recommended Foams

  • Protein based foams
  • AFFF foams
  • AFFF ARC foams
  • Multi-purpose foams
  • Fluorine free foams

Technical data

Max. water flow 4,500 lpm
Sweep range Max. 25/min.
Oscillating angle 60°
Elevation -10° / +80°
Water inlet flange 2½” (DN65)
Water outlet 2½” BSP M thread
Material Anodised aluminium or bronze
Length 440 mm
Height 390 mm
Width 330 mm
Weight 11.6 kg (bronze 20 kg)
Part no. aluminium 20-3200-01
Part no. bronze 20-3200-10


  •  Bronze
  •  4” flange water inlet connection


Balder monitor can be combined with a wide range of
accessories such as:

  • Freja composite nozzles 500 lpm up to 2,500 lpm
  • Uller brass nozzles 1900 lpm up to 4800 lpm
  • Self-inducting versions

Quality Control

Balder range monitors are designed and developed to be user friendly and is manufactured according to internal ISO procedures.